Hair.
Hair health, loss, and care — what the evidence says about growth, thinning, and the treatments worth your time and money.
AHK-Cu vs. GHK-Cu: Which Copper Peptide Wins for Thinning Hair?
GHK-Cu has multiple clinical trials for hair. AHK-Cu has one lab study. Here's what the evidence says about each copper peptide.
Photograph · HL BenefitsThe latest, in long form.
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Female Pattern Baldness: The 3 Peptide Treatments Trichologists Recommend in 2026
Three peptide treatments have gained traction among trichologists for female pattern hair loss. Here is what the clinical evidence actually shows.
GHK-Cu for Hair Loss: The Copper Peptide That's Outperforming Minoxidil in Reviews
HairThe Peptide Hair Serum That Reversed a 5-Year Receding Hairline (with Photos)
HairPeptides for Postpartum Hair Loss: A Gentle Recovery Protocol That Actually Works
GLP-1 and Hair Loss: Why It Happens and What Actually Helps
FDA adverse event data links semaglutide to alopecia at 2.46x the expected rate. Most cases are telogen effluvium from rapid weight loss, and 95% resolve on their own.
Companion sections.
All sections →Health
A companion section to hair, with its own evidence-led reading list.
Food & Nutrition
A companion section to hair, with its own evidence-led reading list.
Weight Loss
A companion section to hair, with its own evidence-led reading list.